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(No Model.) I

H. B. vHALL &. F. G. POWERS.

PLASTERING DEVICE. v N0.330,321. Patented-Nov. 10, 1885..

' (5 5 go! a? I Y Attorney UNITED STATES PATENT OFFICE.

HARVEY B. HALL, OF HOMER, ILLINOIS, AND FRANCIS G. POWERS, OF SOUTH BEND, INDIAN A.

PLASTERING DEVICE.

SPECIFICATION forming part of Letters Patent N0. 330,321, dated November 10, 1885.

Application filed June 10, 1885. Serial No. 169,212, (No model.)

To all whom it may concern:

Be it known that we, HARVEY B. HALL and FRANCIS G. PowERs, citizens of the United States, residing,respectively,at Homer, in the county of Oharnpaign and State of Illinois, and South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Plastering Devices, of which the following is a specification, reference being had therein to the accompanying drawings. This invention relates to certain improvements in plaster-supports for ceilings, walls, and other similar purposes; and it has for its objects to provide for holding the plaster securely in place and furnish a support that will require less plaster than the usual lath or other supports heretofore in use.

To this end our invention consists of a support having a series of longitudinal grooves, which are twofoil in crosssection, and in which the plaster enters when applied, so as to be held securely, as will more fully hereinafter appear.

In the accompanying drawings, Figure 1 represents aperspective view of our improved plaster-supporting device, and Fig. 2 a de laohed sectional View of the plastering.

The letter A indicates a fiat board of any suitable dimensions, which is secured to the joists or studs of a building in any suitable manner. The outer face of said board is formed with a series of grooves, a, which are twofoil in cross-section, the central internal rib or projection helping to fill the space in the grooves, thus economizing plastering material. The grooves as thus constructed being rounded and having no angles do not weaken the board, as all irregular grooves have a tendency to do, thus securing a stronger and more 

